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medians bases circles surds ellipses cryptic clues rugby complex numbers axes triangles dice numbers grids people maths integration 3d shapes geometric means prime numbers volume addition hexagons ave irreducible numbers floors chess algebra lines dominos cubics unit fractions clocks sums indices calculus polynomials mean geometric mean digital clocks consecutive numbers number combinatorics quadratics dodecagons integers median division determinants sport coordinates graphs angles perimeter digital products star numbers crosswords parabolas books 2d shapes tiling geometry pentagons square roots differentiation menace cryptic crossnumbers consecutive integers tangents products regular shapes speed digits folding tube maps balancing probability area remainders factors functions rectangles palindromes wordplay neighbours powers means expansions grids games routes decahedra averages odd numbers proportion factorials spheres sequences coins shape money cards probabilty the only crossnumber perfect numbers tournaments numbers crossnumbers albgebra multiplication christmas chalkdust crossnumber dates planes logic taxicab geometry elections triangle numbers quadrilaterals squares gerrymandering symmetry time doubling multiples shapes scales trigonometry square grids cube numbers sets fractions range polygons chocolate percentages sum to infinity colouring even numbers arrows square numbers pascal's triangle binary matrices partitions advent